<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--需求1: 分别定义两个 div，span标签， 分别修改每个div标签的样式为: 边框1个像素，实线，红色。-->

<div style="border: 1px red solid">div标签1</div>
<div style="border: 1px red solid">div标签2</div>
<span style="border: 1px red solid">span标签1</span>
<span style="border: 1px red solid">span标签2</span>

</body>
</html>